EEOC investigators have been seeking information related to hiring practices, pay disparity and other matters

Uber Technologies Inc. is being investigated by the U.S. Equal Employment Opportunity Commission after a complaint about gender inequity, according to people familiar with the matter.

The inquiry, one of a series of federal probes of the ride-hailing giant, began last August and hasn’t been previously reported. EEOC investigators have been interviewing former and current Uber employees, as well as seeking documents from Uber officials, the people said. They are seeking information related to Uber’s hiring practices, pay disparity...